File formats for transfer

This page sets out the range of digital file formats that The National Archives can currently sustain over the long term. We are able to accept these formats from public record bodies, preserve the information they contain and provide access to them.

The file formats have been categorised into tables; their name, extension and PRONOM unique identifier (PUID) have been provided. If you are using DROID to ascertain which file formats are contained within a set of records you are intending to transfer, the most accurate way to cross-reference your DROID output to this listing will be via the PUID column.

If you have selected digital records for transfer and they are in a format that does not appear on this page please contact us to discuss this. Please note that this list will be updated periodically.